Performance of a trial sea ranch for the commercial sea cucumber, Holothuria scabra, in Papua New Guinea

Hair, Cathy; Militz, Thane A.; Daniels, Nicholas A.; Southgate, Paul C.

doi:10.1016/j.aquaculture.2021.737500

Cited by 16 publications

(4 citation statements)

References 52 publications

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“…The differences in weight found between the control and treatment are clear. As described in most studies involving these organisms with different diets [24][25][26][27], a higher growth is commonly observed in the first sampling moments, followed by a stabilization period. For systems A and B, the highest value before the stabilization of growth was noticed at T5 (70 days into the experiment), showing an improvement in the growth rate of the H. arguinensis, whereas in the abovementioned studies the stabilization would happen after 30 days of experiment.…”

Section: Discussionmentioning

confidence: 89%

Effect of Enriched Substrate on the Growth of the Sea Cucumber Holothuria arguinensis Koehler and Vaney, 1906 Juveniles

et al. 2023

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The sea cucumber Holothuria arguinensis (Koehler and Vaney, 1906) presents an increasing commercial value in Asian markets and its exportation depends exclusively on wild stock harvesting. Production through aquaculture has been acknowledged as an alternative to supply demand and reduce pressure on natural stocks, but there are still bottlenecks to overcome, such as low growth rate and survival. This study focuses on the evaluation of the growth of juveniles of H. arguinensis through substrate enrichment—direct mixing of Sargassum vulgare with sediment—in recirculating aquaculture systems (RAS), for 4 months, with a baseline diet of Saccorhiza polyschides. Compared to the control (no enrichment), sea cucumbers fed with enriched sediment showed the highest specific growth rate (SGR), the highest growth rate (GR) and the lowest size heterogeneity. The results obtained in this study showed a favorable growth of sea cucumbers when in the presence of a substrate enriched with Sargassum vulgare, representing an important step towards the viability of large-scale sea cucumber rearing in Europe.

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Section: Discussionmentioning

confidence: 89%

Effect of Enriched Substrate on the Growth of the Sea Cucumber Holothuria arguinensis Koehler and Vaney, 1906 Juveniles

et al. 2023

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“…The sea cucumber Holothuria scabra is an economically important species of echinoderm in Asian market because of its high nutritional, pharmaceutical and economic value (34). The aquaculture of H. scabra is also popular for meeting the increased demands of market consumption and natural stock restoration (35). During sea cucumber culturing, usage of clear sexes parents will be benefit for the process of breeding and reproduction.…”

Section: Discussionmentioning

confidence: 99%

Proteome analysis provides insights into sex differences inHolothuria Scabra

Cheng,

Wu,

et al. 2024

Preprint

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Sex-determining mechanism is still ambiguous for sea cucumber Holothuria scabra which only manifests gonochorism in gonad. In this study, proteomic analysis was employed to delineate sex-related proteins and genes in gonads of H. scabra, subsequently validated through Quantitative real-time polymerase chain reaction (qRT-PCR). A total of 5,313 proteins were identified via proteome sequencing. Among these, 817 proteins exhibited expression in both the ovary and testis, with 445 proteins displaying up-regulation and 372 proteins showing down-regulation. Furthermore, 136 and 69 proteins were identified as ovary-specific and testis-specific Differentially Abundant Proteins (DAPs), respectively. For the validation of 75 DAP coding genes, 9 genes were considered to be reliable. Notably, 25 ovary-bias proteins enriched in ribosome pathway strongly indicated the crucial role of ribosome in ovary. And 5S/18S rRNA ratio in H. Scabra may have potencial to establish a nondestructive method to distinguish sexes unambiguously. This study serves to furnish novel evidence pertaining to sex differences in H. scabra.

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“…This will provide an estimate of the sand sh biomass inside the ranch as a direct effect of the juvenile restocking activities and the possible spill-over effect outside as an indirect effect of the project. Recent studies in the Philippines (Villamor et al, 2021) and Papua New Guinea (Hair et al, 2022) revealed that sand sh sea ranching resulted in the recruitment of smaller sand sh and an increase in the abundance of other commercial sea cucumber species due to stocking, and protection of the sea ranch. However, how these positive ecological bene ts in Maliwaliw can be transformed into an economic opportunity for the community is yet to be realized.…”

Section: Discussionmentioning

confidence: 99%

Social and ecological impacts, challenges, and lessons learned from the sandfish sea ranching experience in Maliwaliw Island, Eastern Samar, Philippines

Cruz¹,

Gacura²,

Villamor³

et al. 2023

JMIC

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Since the 1970s, Samar and Leyte islands had a thriving sea cucumber fishery but have rapidly declined over the years. In Maliwaliw Island, anecdotal accounts validated by the community revealed that the island had a brisk sea cucumber fishery but collapsed due to uncontrolled collection. In 2013, a sandfish sea ranching project was implemented in Maliwaliw Island, Salcedo, Eastern Samar, to bring back the sandfish that has disappeared from the area, and subsequently provide a supplemental livelihood to the local fishers. This study was conducted to investigate the impacts and lessons learned from the sandfish project. Recruitment of wild stock, increased community knowledge of sea cucumber biology and ecology, additional income through sandfish bycatch, and perceived enhancement of the coastal marine environment of the island were among the positive gains from the project identified by the respondents. On the other hand, poaching by fishers from neighboring communities resulting in inter-community conflicts was a major challenge. Clearly, the sandfish sea ranching project in Maliwaliw achieved ecological, social, and economic impacts on the project participants and the community. However, these gains need to be strengthened with effective management measures including size regulation to sustain the sea cucumber fishery in the area.

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Performance of a trial sea ranch for the commercial sea cucumber, Holothuria scabra, in Papua New Guinea

Cited by 16 publications

References 52 publications

Effect of Enriched Substrate on the Growth of the Sea Cucumber Holothuria arguinensis Koehler and Vaney, 1906 Juveniles

Effect of Enriched Substrate on the Growth of the Sea Cucumber Holothuria arguinensis Koehler and Vaney, 1906 Juveniles

Proteome analysis provides insights into sex differences inHolothuria Scabra

Social and ecological impacts, challenges, and lessons learned from the sandfish sea ranching experience in Maliwaliw Island, Eastern Samar, Philippines

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